A study on stability of active layer of polymer solar cells: effect of UV–visible light with different conditions
- 270 Downloads
The objective of this study is to investigate the stability of the active layer of polymer solar cells from the effect of UV–visible light irradiation using different conditions with respect to time. The active layers were composed of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61 butyric acid methyl ester (PCBM), deposited on conductive glass substrates through spin coating. These samples are placed in a UV–visible light exposure chamber using different conditions (heat and water) over the specific periods of time. The samples are analyzed by UV–visible absorption spectroscopy, X-ray photoelectron spectroscopy and Fourier transforms infrared spectroscopy (FTIR) measurements. The results indicate that after continuous exposure to UV irradiation for 72 and 120 h, the sample shows a significant decrease in absorption of the main peak. The sample shows around 25% loss in absorption (main peak) after 72 h of irradiation. The FTIR results illustrate a progressive decrease in intensities of all typical absorption peaks owing to P3HT ring scission, side chain oxidation as well as degradation of the side groups of PCBM.
KeywordsP3HT PCBM Solar cells UV–visible light XPS analysis FTIR
The authors would like to acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) through the Science and Technology Unit at King Fahd University of Petroleum and Minerals (KFUPM) for funding this work through Project # ENE2379-04 as part of the National Science, Technology and Innovation Plan. KFUPM is also acknowledged for supporting this research. The authors would like to acknowledge the Center of Research Excellence for Renewable Energy at KFUPM.
- 8.Abdou MSA, Lu X, Xie ZW, Orfino F, Deen MJ, Holdcroft S (1995) Nature of impurities in.pi.-conjugated polymers prepared by ferric chloride and their effect on the electrical properties of metal-insulator-semiconductor structures. Chem Mater 7:631–641. https://doi.org/10.1021/cm00052a006 CrossRefGoogle Scholar
- 10.Pacios R, Chatten AJ, Kawano K, Durrant JR, Bradley DDC, Nelson J (2006) Effects of photo-oxidation on the performance of poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylene vinylene]:[6,6]-Phenyl C61-butyric acid methyl ester solar cells. Adv Funct Mater 16:2117–2126. https://doi.org/10.1002/adfm.200500714 CrossRefGoogle Scholar
- 12.Rivaton A, Chambon S, Manceau M, Gardette J-L, Lemaître N, Guillerez S (2010) Light-induced degradation of the active layer of polymer-based solar cells. Polym Degrad Stab 95:278–284. https://doi.org/10.1016/j.polymdegradstab.2009.11.021 CrossRefGoogle Scholar
- 13.Shamieh B, Obuchovsky S, Frey GL (2016) Spontaneous generation of interlayers in OPVs with silver cathodes: enhancing Voc and lifetime. J Mater Chem 4:1821–1828Google Scholar
- 16.Visoly-Fisher I, Mescheloff A, Gabay M, Bounioux C, Zeiri L, Sansotera M et al (2015) Concentrated sunlight for accelerated stability testing of organic photovoltaic materials: towards decoupling light intensity and temperature. Sol Energy Mater Sol Cells 134:99–107. https://doi.org/10.1016/j.solmat.2014.11.033 CrossRefGoogle Scholar
- 19.George Socrates (2004) Infrared and Raman characteristic group frequencies: tables and charts, 3rd edn. Wiley-VCH Verlag GmbH & Co. KGaA; nd Google Scholar
- 20.Madogni VI, Kounouhéwa B, Akpo A, Agbomahéna M, Hounkpatin SA, Awanou CN (2015) Comparison of degradation mechanisms in organic photovoltaic devices upon exposure to a temperate and a subequatorial climate. Chem Phys Lett 640:201–214. https://doi.org/10.1016/j.cplett.2015.09.023 CrossRefGoogle Scholar